Showing structure for (3ar,4s,6r,7s,8r)-7-[2-(acetyloxy)propan-2-yl]-3a,8-dihydroxy-1,4-dimethyl-2-oxo-3,4,5,6,7,8-hexahydroazulen-6-yl (2z)-2-methylbut-2-enoate